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Addition
Subtraction
Word Problems
Math Rules
Vocabulary
100

8 + 15

What is 27?

100

28 - 7

What is 21? 

100

Julia walked for 15 minutes. Then she took a break. After her break, she walked another 20 minutes. How many minutes did Julia walk in total? 

What is 35 minutes?
15 + 20 = 35

100

The addition rule for numbers with the SAME sign.

What is "add the numbers and keep the common sign"?

100

A whole number that can be positive, negative or zero

What is an integer?

200
-13 + (-21)

What is -33? 

200

- 14 - 6

What is -20? 

200

The top of the mountain is 5380 meters and the base of the mountain is below sea level, at -621 meters. 

What is the difference in feet between the top and base of the mountain? 

What is 6001 meters? 

5380 - (-621) = 5380 + 621 = 6001

200

The subtraction rule

What is "subtracting is the same as adding the opposite"? 

200

The distance a number is from zero. It is always positive. 


Ex: 15 = 15, -18 = 18

What is absolute value?

300

68 + (-53)

What is 15? 

300

9 - 16

What is -7? 

300

Drea has $32.52 in his bank account. After getting some money for his birthday, he deposits $73 into his account. How much money does Drea have in his bank account? 

What is $105.52 ?

32.52 + 73 = 105

300

The addition rule for numbers with the DIFFERENT sign.

What is "subtract the numbers and keep the sign of the number with the larger absolute value"?

300

The number that, when added to another number, the sum is zero. Also known as, the opposite of a number. 


Ex:    25 an -25

What is additive inverse?

400

7.5 + (-3.2)

What is 4.3?

400

41 - (-19)

What is 60? 

400

Joselin has $20.25 and spends $13.50 on snacks. How much money does Joselin have left? 

What is $6.75?

20.25 - 13.50 = 6.75

400

Rewrite -8 - 6 as an addition problem.

What is -8 + (-6)?

400

A type of number that includes fractions, decimals and integers.

What are rational numbers? 

500

-6 1/2 + 2 1/4

What is -4 1/4 ?

500

4 1/2  -  8

What is -3 1/2 ?

500

Ms. Gross owes her friend $35 for dinner. Ms. Gross pays her friend back $23.60. How much does Ms. Gross still owe her friend? 

What is $11.40? 

35 - 23.60 = 11.40

-35 + 23.60 = -11.40

500

Rewrite 13 - (-2) as an addition problem.

What is 13 + 2?

500

When two numbers are subtracted.

What is difference?